... fix logo in README.org ...

README.org

@@ -1,6 +1,6 @@
 #+BEGIN_HTML
 <a href="http://cran.rstudio.com/web/packages/BuyseTest/index.html"><img src="https://www.r-pkg.org/badges/version-last-release/BuyseTest", alt="CRAN version"></a>
-<a href="http://cranlogs.r-pkg.org/downloads/total/last-month/BuyseTest"><img src="http://cranlogs.r-pkg.org/badges/BuyseTest", alt="Download count"></a>
+<a href="http://cranlogs.r-pkg.org/downloads/total/last-month/BuyseTest"><img src="https://cranlogs.r-pkg.org/badges/BuyseTest", alt="Download count"></a>
 <a href="https://ci.appveyor.com/project/bozenne/BuyseTest"><img src="https://ci.appveyor.com/api/projects/status/github/bozenne/BuyseTest?svg=true" alt="Build status"></a>
 <a href="https://github.com/bozenne/BuyseTest/actions"><img src="https://github.com/bozenne/BuyseTest/workflows/r/badge.svg" alt="Build status"></a>
 <a href="http://www.gnu.org/licenses/gpl-3.0.html"><img src="https://img.shields.io/badge/License-GPLv3-blue.svg" alt="License"></a>